/*
 *
 *  Copyright (C) 2010 Tal Eisenberg
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package tal.drivechain.matchers;

import tal.drivechain.chain.ChainNode;
import tal.drivechain.expression.dcExpression;
import tal.drivechain.variable.types.DataType;

/**
 *
 * @author Main
 */
public class BooleanMatcher extends ValueMatcher {
    dcExpression bool;
    
    @Override
    protected void parseSpecial(String pattern) throws IllegalArgumentException {
        if (pattern.equals("true") || pattern.equals("false")) pattern = "${" + pattern + "}";
        else if (!pattern.startsWith("${") || pattern.charAt(pattern.length()-1)!='}')
            throw new IllegalArgumentException("Invalid boolean value pattern: " + pattern);
        bool = new dcExpression(pattern, DataType.BOOLEAN);
    }

    @Override
    protected boolean matchSpecial(Object value, ChainNode context) throws IllegalArgumentException {
        Boolean b = (Boolean)value;
        return (b.booleanValue()==((Boolean)bool.evaluate(context)).booleanValue());
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof BooleanMatcher) {
            if (super.equals(obj)) return true;
            else {
                BooleanMatcher that = (BooleanMatcher)obj;
                return (this.bool.equals(that.bool));
            }
        } else return false;
    }

    @Override
    public String toString() {
        return bool.toString();
    }

    @Override
    public int hashCode() {
        int hash = 3;
        hash = 29 * hash + (this.bool != null ? this.bool.hashCode() : 0);
        return hash;
    }

}
